کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5787128 1641108 2017 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seismic signal time-frequency analysis based on multi-directional window using greedy strategy
ترجمه فارسی عنوان
تجزیه و تحلیل فرکانس زمانی سیگنال لرزه ای بر اساس پنجره چند جهته با استفاده از استراتژی حریص
کلمات کلیدی
استراتژی حریص، توزیع کوهن، تبدیل غربی گابور، سرکوب کلمات صریح، تجزیه طیفی سیگنال های لرزه ای،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
Wigner-Ville distribution (WVD) is an important time-frequency analysis technology with a high energy distribution in seismic signal processing. However, it is interfered by many cross terms. To suppress the cross terms of the WVD and keep the concentration of its high energy distribution, an adaptive multi-directional filtering window in the ambiguity domain is proposed. This begins with the relationship of the Cohen distribution and the Gabor transform combining the greedy strategy and the rotational invariance property of the fractional Fourier transform in order to propose the multi-directional window, which extends the one-dimensional, one directional, optimal window function of the optimal fractional Gabor transform (OFrGT) to a two-dimensional, multi-directional window in the ambiguity domain. In this way, the multi-directional window matches the main auto terms of the WVD more precisely. Using the greedy strategy, the proposed window takes into account the optimal and other suboptimal directions, which also solves the problem of the OFrGT, called the local concentration phenomenon, when encountering a multi-component signal. Experiments on different types of both the signal models and the real seismic signals reveal that the proposed window can overcome the drawbacks of the WVD and the OFrGT mentioned above. Finally, the proposed method is applied to a seismic signal's spectral decomposition. The results show that the proposed method can explore the space distribution of a reservoir more precisely.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Applied Geophysics - Volume 143, August 2017, Pages 116-128
نویسندگان
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